Adjusting caster on a SPF GT 40 N=MK II

[Mark Coulter]

Hidey ho guys. So i need to be able to adjust the caster on my LF wheel and i have figured out to get the front end where i need it i need to make the LF lower control arm rear hime joint be adjustable. I thinking to cut a slot for the lwr control arm rear bolt and then adjust a tack weld the washer. Or install a ecentric cam into the lower control arm or just cut the control arm in half and put threads so i can make is longer or shorter. Bottom line in need the lower ball joint to move forward just a little bit to get correct location and to add 2 degrees caster. Any help you can give me is greatly appreciated

 

[Mark Coulter]

Wow im paying attention--didnt see i had a GT 40 N=MKII Just MKII GT 40

 

[David Garton]

This came to mind as a Ford technician. This is a blow up of the Explorer front suspension . It uses slotted cotroler arm mounting brackets and the bolt kits have keyed bolts with cams that move balljoint forward or back for caster adjustmet. The cam bolt kits are easaly available. Hope this helps or gives guidance.

 

[Mark H.]

Interested in why you need the additional caster, high speed stability? Is there not a way the SPF stock suspension allows for some adjustment?

 

[Mark Coulter]

Interested in why you need the additional caster, high speed stability? Is there not a way the SPF stock suspension allows for some adjustment?

The rear you can adjust every way needed--front end you can only adjust toe and camber. Im sure somebody has figured this out--lot of ways to modifi it just not sure which way im going to go with.

 

[Morten]

Hi, so which bearing width are you using on lower front arms. Are the 1/2in bosses thats welded into the chassis possible to skim off so you can move the arm forwards and fit a shim on the inside of the bolt / bearing thus achieving your caster?

 

[Mark Coulter]

Hi, so which bearing width are you using on lower front arms. Are the 1/2in bosses thats welded into the chassis possible to skim off so you can move the arm forwards and fit a shim on the inside of the bolt / bearing thus achieving your caster?

awwe i see what your saying-but i dont have enough room - i need to move it about 7/16 inch. I think if i cut a slot and tack weld a eccentric might do the trick. If i have enough room for your idea--i think that would work best. However i would like to be able to adjust it so i can get it dead nuts on. Thanks for you insight Morten

 

[Morten]

Making an excentric bolt/washer would only move the lower arm out or in (camber)
Monocoque setups are not adjustable for caster, thats built into the uprights.
How many degrees neg. Caster & camber do you have now?

Optionally you could go for rodend fitted arms that would make the full frontend adjustable.

 

[Mark H.]

This looks like a solution. https://dirtwheelsmag.com/how-to-adjusting-camber-caster/

 

[Mark H.]

Or maybe something like this might work ? https://farfromstockstore.com/products/7-8-x-3-4-offset-rod-ends

 

[Mark H.]

Or this type of thing? Just throwing out ideas. https://www.steinertractor.com/ACS281-Cam-Lock-Bolt

 

[Morten]

Can you post a couple photos and draw with arrows how you want the armes/upright moved ?